WiMax

WIMAXGerman TavrisovLovander Powell

OVERVIEW

• Introduction

• History

• Application

• Competing Technologies

• WiMax Protocol Stack

WHAT IS WIMAX?

• Worldwide Interoperability for

Microwave Access

• OFDMA

• Performance similar to WiFi

with coverage of cellular

networks.

• Standards initiative

• IEEE 802.16

History 1990s

Telecoms investigate wireless networks for low cost last mile connectivity.

1999 IEEE 802.16

Fixed WiMax 2001

WiMax Forum established 2005

IEEE 802.16e Mobile WiMax

APPLICATION

• Mobile Broadband

• Solution to “Last Mile”

• Triple Play

• Wireless Backhaul

WiMax vs WiFi• MANs vs LANs• High Cost vs Low• Licensed vs Unlicensed • Low speed vs high

speed• Mobility• QoS

WiMax vs LTE

• Standards based vs Proprietary • Deployment• Backhaul vs Access

WIMAX Protocol Stack

Looking at the PHY Layer Only:

PHY LAYER

• OFDM/OFDMA

• Modulation and Coding

• Data rates

Uplink/Downlink data rates

Security Layer

• Basic attacks at the PHY layer• Jamming • and packet scrambling

• Security Threats• Man in the middle• Denial of Service(protocol) and (physical)

• Security Measures• PKE, EAP,& EAS

AES Encryption

Public Key Infrastructure

EAP based authentication

MAC Layer

• Frame Structure• QOS: five classifications

-UNGS, rtPs, nrtPs,ertPs,and BE

Frame Structure:MAC Layer

Network Layer

• The various IEEE 802.16• Various ranges of the

standard IEEE, d, e, & m

• CPN- Customer Premise Network

• CSN- Connectivity Service Network

• APN- Access Service Network

Network Reference Model

References [1] What is WIMAX. Wimax.com Broadband Solutions, Inc. [Online]. Available:

http://www.wimax.com/general/what-is-wimax [2] History of WIMAX. Quantum Networks, LLV. [Online]. Available:

http://quantumwimax.com/index.php?page=History-of-Wimax [3] Wimax vs Wifi. [Online]. Available: http://freewimaxinfo.com/wimax-vs-wifi-comparison.html [4] R. Henshaw. Why the wimax vs. LTE battle isn’t a battle. Wimax.com Broadband Solutions, Inc.

[Online]. Available: http://www.wimax.com/lte/why-the-wimax-vs-lte-battle-isnt-a-battle [5] What is IEEE 802.16? Wimax.com Broadband Solutions, Inc. [Online]. Available:

http://www.wimax.com/wimax-technologies-standards/what-is-ieee-802.16x [6] T. Sanders. Fiver Essential Elements of Wimax Security. Wimax.com Broadband Solutions, Inc.

[Online]. Available: www.wimax.com/wimax/five-essential-elements-of-wimax-security [7] P. DeBeasi. Wimax security. Burton Group. [Online]. Available:

http://ntsblog.burtongroup.com/network_and-telecom_strat/2008/10 [8] I. Poole. Wimax mac layer. Adrio Communications Ltd. [9] AIRCCSE International Journal of Computer Networks and Communications (IJCNC). [Online].

Available: http://airccse.org/journal/ijcnc.html